Croxton, Clive A. Introductory eigenphysics : an approach to the theory of fields / C. A. Croxton. - London : John Wiley & Sons, 1974. - x, 275 p. : ill. ; 24 cm. Bibliography: p. 269-271. ISBN: 0471189294 Subjects--Topical Terms: Field theory (Physics).Boundary value problems.